Outlook 2003 and DoS

Tutorials Win: Microsoft Windows Forum

Had a situation yesterday where a SMTP mailserver was being DoS'd by a
client.

Culprit was an Outlook 2003 desktop, which was trying to send a number of
oversize attachments.

The mailserver has an attachment-size limit set, and quota on the mailbox,and
it seems that Outlook does not recognise this situation, but instead keeps
hammering the server with a continuous series of send attempts.

I'm not hopeful of any fix, but just thought I'd mention it.
Top

Re: Outlook 2003 and DoS by Roady

Roady
Wed Mar 19 02:29:15 PDT 2008

Securing a server isn't up to a client application.

--
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more

http://www.msoutlook.info/
Real World Questions, Real World Answers

-----

"Anteaus" <Anteaus@discussions.microsoft.com> wrote in message
news:34178CB1-2A55-4479-AF02-4713756336AB@microsoft.com...
> Had a situation yesterday where a SMTP mailserver was being DoS'd by a
> client.
>
> Culprit was an Outlook 2003 desktop, which was trying to send a number of
> oversize attachments.
>
> The mailserver has an attachment-size limit set, and quota on the
> mailbox,and
> it seems that Outlook does not recognise this situation, but instead keeps
> hammering the server with a continuous series of send attempts.
>
> I'm not hopeful of any fix, but just thought I'd mention it.
>
>
Top

Re: Outlook 2003 and DoS by Diane

Diane
Wed Mar 19 06:00:07 PDT 2008

What error code does the server give outlook when it refuses to accept the
message? Does the server NDR the oversized message? An error code should
stop the current attempt - and if it generates an NDR, all future attempts.
But if the server doesn't tell outlook (or the user in the form of a
warning email) how is either to know its too large?

(There won't be "a fix" to outlook.)

--
Diane Poremsky [MVP - Outlook]
Author, Teach Yourself Outlook 2003 in 24 Hours
Need Help with Common Tasks? http://www.outlook-tips.net/beginner/
Outlook 2007: http://www.slipstick.com/outlook/ol2007/

Outlook Tips by email:
dailytips-subscribe-request@lists.outlooktips.net

Outlook Tips: http://www.outlook-tips.net/
Outlook & Exchange Solutions Center: http://www.slipstick.com
Subscribe to Exchange Messaging Outlook newsletter:
EMO-NEWSLETTER-SUBSCRIBE-REQUEST@PEACH.EASE.LSOFT.COM

** Please include your Outlook version, Account type, and Windows Version
when requesting assistance **


"Anteaus" <Anteaus@discussions.microsoft.com> wrote in message
news:34178CB1-2A55-4479-AF02-4713756336AB@microsoft.com...
> Had a situation yesterday where a SMTP mailserver was being DoS'd by a
> client.
>
> Culprit was an Outlook 2003 desktop, which was trying to send a number of
> oversize attachments.
>
> The mailserver has an attachment-size limit set, and quota on the
> mailbox,and
> it seems that Outlook does not recognise this situation, but instead keeps
> hammering the server with a continuous series of send attempts.
>
> I'm not hopeful of any fix, but just thought I'd mention it.
>
>
Top